<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>9.初始化state</title>
</head>
<body>
    <!--准备好一个容器-->
    <div id="test"></div>
    <!---引入react核心库-->
    <script type="text/javascript" src="./js/react.development.js"></script>
    <!--引入react-dom用于支持react操作dom-->
    <script type="text/javascript" src="./js/react-dom.development.js"></script>
    <!--引入babel用于将jsx转为js-->
    <script type="text/javascript" src="./js/babel.min.js"></script>

    <script type="text/babel"> //此处一定要写
    //1.创建组件
        class Weather extends React.Component{
            //初始化状态
            state = {isHot:false,wind:'微风'}
            //自定义方法---要用到语句的形式+箭头函数 //用箭头函数主要是箭头函数没有自己的this，在箭头函数调用的this是外部的也就是weather的this，可以获取到state
            changeWeather=()=>{
                    const isHot = this.state.isHot
                    this.setState({isHot:!isHot})
                    console.log(this.state.isHot)
                }
        
            render(){
                const {isHot} = this.state
                console.log(this)
                return <h1 onClick={this.changeWeather}>今天天气很{this.state.isHot? '炎热' : '凉爽'},{wind}</h1>

            }
        }
        
    //2.渲染
        ReactDOM.render(<Weather/>,document.getElementById('test'));
    </script>
</body>
</html>